Spool holder



FIG. 1 is a perspective view of a spool holder showing my new design;

FIG. 2 is a side elevational view taken from the left of FIG. 1.

FIG. 3 is a top view thereof; and

The three sides not shown in FIG. 2 are substantially identical to the side of FIG. 2 and the underside of the base is plain and unornamented. 

The ornamental design for a spool holder, as shown and described. 